A cokpokation



BEST AVAILABLE Cop.-4

1614682 Jan 18 1927 L. A. osGooD ET A1.

SCALE Filed July 31. 1922 3 Sheets-Sheet 1 BEST AVAILABLE COP` i SCALEFiled July 5l 1922 3 Sheets-Sheet 2 /7 7 69 5a e4 n 72- 67 69 70 73 se631 7L 5 3 6 68 Q 6L $5 65 Q 2/ am? l j 65; 73X (f1.2 l es A 69 4 13 smv 70 58j 7L Q1 7gJET y BEST AVAILABLE Cor#`- 1,614,682 Jan. 18 1927. A.OSGOOD ET A L l SCALE Filed July 31, 1922 l 3 sheets-,she'et s BESTAVAILABLE COF Patented Jan. 18, 1927.

nutren stares PATENT OFFICE.

LOUIS A. OSGOOD, OF DAYTON, AND ELMER E. WOLF, OF SPRINGFIELD, OHIO, AS-

IGNORS TO INTERNATIONAL SCALE COMPANY, OF DAYTON, OHIO, A CORIORATION OFILLINOIS.

SCALE.

This invention relates to improvements in scales (Case 46) and is moreparticularly directed to improved combination of automatic loadcounterbalancing system and flexibly suspended lever system for drivingthe indicator in accordance with displacement ot the automaticcounterbalancing system by the applied load. Other detailed objects ofthe present improvements will be more fully set forth in theaccompanying specifications and claims.

In the drawings:

Fig. 1 is a. part sectional front elevation view of the improved scale.

Fig. 1a is a detail ot one ot' the parts shown broken away in Fig. 1.

Fig. 2 is a detail sectional view of load counterbalancing system. Thesection is taken on line 2-2 of Fig. 3.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2. l

Fig. 4-'is a detail central sectional view taken on line H of Fig. 1.

Fig. 5 is a small detail sectional view taken on line 5--5 of Fig. 1.

Figs. 6 and 7 are detail horizontal sections of the parts within thedial housing.

Fig. 8 is the detailed view of hub portion of the pivotal indicatorshowing sealing i! weights thereon.

Fig. 9 is a detailed View o'f the compensating cam and associatedgravity weight.

The scale comprises the usual base level` system, not shown, supportinga load support and connected to a steelyard 12 which cxtends upwardlycentrally within the housing or pedestal 13. Upon application of load toload support the steelyard 12 is drawn downwardly to extent proportionalto the applied load. The upper end of the steel yard is threaded into aball retaining collar 15 and into a lock nut 14. The balls of theretaining collar rest upon an annular pla-te .1l-3 which is supported onthe top of a tube 17 and clamped there. by means of a suitable soc-lietand spilt casting 18. The'parts just described form a. swivel connectionfor the draft rod and permit the relative rotation of casting 1SA withrespect to the steelyard 12 when it desired to rotate the dial housingof the scale.

The top ot pedestal 13 is provided with a casting having a ball racethereon receiving balls 19 which in turn support a depending head 2Origidly carried by dial housing 1922. Serial No. 578,598.

21. These parts form a turn table device and permit the relativerotation of the dial housing with respect to the pedestal.

With a rotatable dial housing of this sort it is necessary that aparticular form of dash pot be employed. This comprises a dash potcylinder 22 which is supported by casting in any desired manner. Thiscylinder has a central threaded opening which receives an upstandingpipe 23, which pipe extends into the lower end of the pipe orl tube 17.Suitable nuts 24 and proper packing are provided to clamp the pipe 23 inthe dash pot cylinderl 22. The plunger or piston of the dash pot isformed by two spaced plates 25 clamped'to the lower end ot pipe 17 andsupporting between them a loose annular plate 26, having stuck upp0rtions or nubs thereon to prevent sticking of the loose plate toone'or the other of the supporting shoulder plates; This plungerconstruction permits the dash pot plunger to have free movementlaterally in the cooperating cylinder and likewise a slight up and downmovement to thereby provide the utmost freedom from friction and tominimizestickingand binding. The dash pot being axially mounted withrespect to the center of rotation-of the dial housing and having acentral opening permitsfthe steelyard'12 to extend through the center'of the dash pot. At the same time the construction :of the dash pot-issuch that it forms a seal and prevents the access of dust'into the dial.housing. It" will be understood that the dial housingis yclosed up inthe usual manner by glass-plate, etc.

The casting 18 at-its upper end is drilled to receive tube 27 which'orms a bearing for knife' edge 28 which knife vedge is carried byevener laars 29. These bars are spaced alpart and knife'edge 28 bridgesand connects t icm.

It will be'understood that when theloadI is applied'to the scaleplatform that` parts 28 and 29 are displaced directly in accordance withapplied load.

The` automatic load counter balancing system will be best understood by.referring to Figs. 2 and 1.

Upon the application of a load the dra-ft rod 12 will be pulleddownwardly drawing the eveners 29 downwardly to an extentproportional tothe applied load. These eveners 29 are suspended by four iiexible tapes30 which have a wrapped connection about substantially circular hubs 31so as to rotate them in the direction of the arrows upon application ofa load. The circular hubs 3l have proper curved rolling surfaces toreceive theL flexible load transmitting tapes. The hubs 3l are alsoprovided with proper curved rolling surfaces receiving flexiblesuspension tapes 33. These latter tapes are wrapped around rollingsurfaces associated with the hubs 3l and cooperate with bearing plate 34which is disposed between the'two tapes 33. Plates 34 are suitablysupported in the frame of the machine from studs 34a. Also fastened to'the hubs are pendulums 32 having their stems relatively crossing eachother as shown. Upon the application of a load the eveners 29 drawdownwardly upon tapes 3() causing the pendulum 32 to swing outwardly andupwardly and causing tapes 33 and 30 to unroll from their cooperatingrolling surfaces. Rigid with the hubs are arms 36 which upon applicationof a load swing in the direction indicated by the ar.- rows. These arms36 have arcuate end portions 37 about which there is wrapped andfastened a tape 38. The tape 38 is connected to a stud 39 carrying aknife edge 40. The foregoing parts constitute the automatic pendulumload counterbalancing system of the scale. This dial system is connectedthrough knife edge 40 with a superimposed flexibly connected leversystem. The knife edge 40 rests in bearings 45 carried by a pair ofjoined plates 46, Fig. 6, which plates form a lever of the second order.The lever 46 is provided with an adjustable balance. weight 47 and forits fulcrum utilizes a vpair of flexible tapes 48 which extend over therolling surfaces of blocks 49 carried by the end of the lever. Tapes 48are fastened at their upper ends over rocker arms 50 which are pivotedin the frame of the machine and adjustable as will belaterdescribed. Thelever 46 at its opposite end carries tape-'bearing blocks 5l providedwith a curved rolling surface upon which are supported flexible tapes52. These tapes extend upwardly and are fastened over similar blocks 53carried b v lever T his lever is likewise made of two space plates (sceFig 7 Flexible tapes are utilized to form a suspension and fulcrum forthis lever 54. For this purpose a tape supporting shaft or stud is fixedin the frame of' the machine and at each side of plate 54 there isprovided a depending tape 5G which at its upper end is fastened to theshaft 55 and at its lower end is wrapped about and fastened to a curvedbearing block 57 which is directly fastened to plate As shown in Fig. lthere are two tapes for each side play or four tapes to suspend theentire lever. Each pair of tapes relatively cross and intersect'eachother andthe curved bearing blocks 57 are shaped and located so as toprovide for the intersection of the tape suspension line. In this way apredetermined fulcrum point is secured for lever 54.

The opposite end of lever 54 carries tape bearing blocks 58 each ofwhich carry a plural-ity of superimposed tapes. One pair 59 extend toand support a counter weight 60. The other pair 6:2 extend to and passover the curved surface of block 63 which block is carried bysupplementary lever 64. The end of this last mentioned pair of tapes areadjustably connected to the lever by means of the pivoted tape adjustingdevice 65. There is also provided a second supplementary lever 66 whichin many respects is similar to lever 64 and this lever is interconnectedto the free end of lever 54 by tapes 67 which roll over tape 52 on block53 and over blocks 63 and finally connect with tape adjusting device 65mounted on lever 66. Levers 66 and 64 are fulcrumed upon pin bearings 68which are adjustably mounted in the frame of the device by means ofpivoted adjustable arms 69. Suitable stop screws 70 are also provided tolimit the side movement of the levers at their fulcrum point. Thesupplementary levers 64 and `66 are utilized to drive the pivotalindicator 71. For this purpose the levers are-provided with bearingblocks 7 2 over which pass tape 73 which in turn pass under and arefixed to a roller or arbor 74 which carries the pivotal indicator 7l.The tapes 73 form a free floating suspension for the indicator and itsarbor and obviate the use of any bearing or pivot therefor. Theeffective length of. tapes 73 may be adjusted by adjusting devices 65which are provided on each lever at the end of the tapes.

Mounted upon the opposite end of the indicator arbor from the indicatoris gravity weight pulley 75 which by means of flexible tape 76 supportsgravity weight- 77. The purpose of this weight is to take up any slackin the tape system. Furthermore, this pulley may be provided withcompensating cam contour to bring the scale to exact seal and cause theindicator to move equally under equal increments of applied load (sccFig. 9,).-

The scaling` of the scale may also he secured by adjusting sealingweights 7) on indicator 7l (see Fig, S).

The load dial 80 is of the usual forni and is supported in any desiredmanner in the dial housing. ln addition to the low graduations this dialis also provided with graduations extending back of zero in the blankspace as shown at 8l to provide for lare indications.

T11-order to set the scale for tare weight knob 89.- (see Fig, la) isrotated thereby turning shaft 83 and drawing threaded block 84' to theright thereby lowering the CII part 50. The lowering of 50 slacks olf ontapes 4.8 and causes lever 46 to rock anticloclrivise about as a center.This movement slacks off on tapes 52 and allows lever 54 to rockanti-clockwise under the point of the gravity Weight 60. uThe movementof lever 54 rocks the supplementary levers 64- 66 in such a Way as toturn pivotal indicator acjr of Zero to the desired point on the tareZero adj ustment of the scale is secured by adjusting a stop stud 85 tosivingl the parts 5() and bring the indicator to zero. Restoration ofpart is secured by means of spring 86.

`We claim:

l. In a Weighing` scale comprising a fixed frame and a movable loadsupporting memsupporting member and said indicating devices, asupporting fulcrum for said lever comprising a plurality of tapesfixedly supported to said frame above said lever, curved blocks carriedby said lever over which said tapes pass, said blocks and tapes being soarranged that the plane of one tape intersects the plane of another tapeto predetermine the fulcrum point of the lever.

2. A Weighing scale comprising in combination, a Weight indicatingmeans, a load supporting element and intermediate movement multiplyingconnections betvveen said element and means comprising a plurality oflevers operatively connected together by flexible tape-like members, andan interconnected automatic counterbalancing means.

3. A weighing scale comprising in com-- bination with a load support, anindicator, operating connections intermediate the load support andindicator comprising automatic load counterbalancing means connected tosaid load support, a lever system connected to said loadcounter-balancing means and operatively connected to said indicator,said lever system having a flexible tape suspension and flexibletape-like connections intermediate the levers forming said lever system.

4l.. A Weighing scale comprising a load support, an indicator, operatingconnections intermediate the load support and indicator comprising anautomatic load counterbalancing means and a lever system having aflexible tape-like suspension and flexible tape-like connectionsintermediate the levers forming said lever system.

5. A Weighing scale comprising a load support, an indicator, operatingconnections therebetween comprising an automatic load counterbalancingsystem, an interconnected lever system intermediate the loadcounterbalancing means and the indicator, and flexible tape-like drivingconnections intermediate said lever system and indicator.

6. A Weighing scale comprising a load support, an indicator, operatingconnections therebetween comprising an automatic load counter-balancingsystem, an interconnected lever system, and flexible tape-like driving`connections intermediate said lever system and indicator, said lastmentioned tape-like driving' connections forming a freely floatingsuspension for said indicator.

7. A weighing scale comprising a load support, an indicator, operatingconnections therebetween comprising an automatic load counterbalancingsystem, an interconnected lever system and flexible tape-like drivingconnections intermediate said lever system and indicator, the aforesaidlever system comprising a plurality of levers, flexible tape-likemembers connecting said levers with each other and tape-like fulcrumsfor the said levers for the purpose described.

8. A Weighing scale comprising in combination, a load support, anautomatic load counter-balancing system, an indicator, a lover systemintermediate the load support and indicator, and comprising a pluralityof levers and tare adjusting devices adapted to shift one of thefulcrums of one of the levers of the lever system and thereby displacethe indicator.

9. A Weighing scale comprising in combination, a load support, anautomatic load counterbalancing system, an indicator, a lever systemintermediate the load support and indicator and comprising a pluralityof levers, tare adjusting devices adapted to shift one of the fulcrumsof one of the levers of the lever system and thereby displace theindicator. and a gravity Weight associated with said lever system andindicator for displacing the latter upon the adjustment of the taredevices.

l0. A Weighing scale comprising in combination, a load support, anautomatic load countcrbalancing system, an indicator, a lever systemintermediate the load support and indicator and comprising a pluralityof levers, tape-like connections intermediate the said levers, and tareadjusting devices adapted to shift one of the fulcrums of one of thelevers of the lever system and thereby permit the displacement of theindicator.

ll. A weighing scale comprising in combination, a load support, anautomatic load counterbalancing system, au indicator, a lever systemintermediate the load support and indicator, and comprising a pluralityof levers, a tape-like fulcrum for one of the levers of said leversystem. and tare adjusting devices adapted to shift said tape-likefulcrum to raise or lower the latter and thereby cause the displacementof the indiat-or.

Cil

12. A weighing scale comprising in combination, a load support, anautomatic load counterbalancing` system, an indicator, a lever systemintermediate the load support and indicator, and comprising a pluralityof levers, a iiexible tape-like fulcrum for one of the levers of saidsystem, a rocking` curved tape supporting member upon one of saidlevers, and tare adjustingdevices having a tape connection with saidsupporting,` member for changing the fulcrum position of the lever andthereby causing the displacement of the indicator.

13. A. Weighing scale including;l a dial housing, a. draft rod extendingtherein, a member connected to said draft rod, a pipe depending' fromsaid member about said draft rod, dash pot cylinder concentrictherewith, an upstanding pipe projecting from said cylinder intelescopic relation to said first mentioned pipe, and a dash pot plungercarried by said first mentioned pipe.

14e, A weighing); scale including' a dial housing', a draft rodextending therein, a swivel connection on said draft rod, a memberconnected to said swivel connection, a pipe dependingl from said memberabout said draft rod, a dash pot cylinder concentric therewith, anupstanding pipe projecting' from said cylinder in telescopic relation tosaid first mentioned pipe and a dash pot plunger carried by said firstmentioned pipe.

15. A ivighing scale comprising a load support, a pendulum automaticload counterbalancing' means, flexible suspension and load transmitting`means therefor, a lever system includingl a lever having a flexible tapesuspended fulcrum at one end, an intermediate connection to saidautomatic load counterbalancing means, curved bearing block devices atthe end remote from the fnlcrum, cooperating tape members thereon, apair of supplementary levers, one of Which is connec ed to the firstmentioned lever by said tape members, an intermediate lever having afiexible tape fulcrum, flexible tapeiike members connecting` the ends ofthe intermediate lever With the said supplementary levers, a pivotalindicator having a hub, and flexible tape-like connections intermedi.-ate said supplementary levers and indicator, ntid connections adapted toform a floating` suspension for the indicator hub.

16. A lever system for a Weighing' scale, comprising a load support,load offsetting' means and a multiplying lever system, said lever systemcomprising a plurality of coacting levers, curved bearing blocks on saidlevers having' curved rolling` tape receiving; surfaces and flexibletapes passino; over said surfaces and connected with said levers fortransmitting movement from one lever to another.

17. A lever system for a Weighing scale, con'lprising a load support, aninterconnected multiplying` lever system, load offsetting means, saidmultiplying' lever system comprisinglT a plurality of coacting levers,said evers having` thereon curved bearing` blocks provided with curvedrollingtape receiving surfaces, certain of said blocks being adapted toreceive flexible tapes forming the fulcrums of the levers and other ofsaid blocks being adapted to receive 'flexible tapes which transmitmovement 'from one lever to another.

18. A lever system for a weighing,` scale, comprising a load support,load offsettingmeans and a multiplying),` lever system connected withsaid load offsetting means and therethrough to said support, saidmultiplyv ing' lever system comprising a plurality of coacting levers,said levers having curved bearing blocks thereon forming curved rollingtape receiving surfaces, flexible tapes passing over said surfaces 'andconnected With the said levers for transmitting' movement from one leverto another and adjusting devices on said levers for varying' theeffective length of the tapes.

In testimony whereof We hereto affix our signatures.

LOUIS A. OSGOOD. ELMER E. lVOLF.

